package jdbc;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Scanner;

public class JDBCDemo9 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("请输入用户名:");
        String userName = scan.nextLine();
        System.out.println("请输入密码:");
        String passWord = scan.nextLine();
        try (Connection connection = DBUtil.getConnection()){
            String sql = "SELECT id,username,password,nickname,age\n" +
                    "FROM userinfo\n" +
                    "WHERE username = ? AND password = ?";
            PreparedStatement ps = connection.prepareStatement(sql);
            ps.setString(1, userName);
            ps.setString(2,passWord);
            ResultSet rs = ps.executeQuery();
            if (rs.next()){
                String nickname = rs.getString("nickname");
                System.out.println("登陆成功!欢迎[" + nickname + "]回来");
            }else {
                System.out.println("登录失败!用户名或密码错误");
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}
